Interannual variability and decadal stability of benthic organisms on an Indonesian coral reef

Rovellini, Alberto and R. Dunn, Matthew and A. Fulton, Elizabeth and Woods, Lisa and Jompa, Jamaluddin and Haris, Abdul and J. Bell, James (2021) Interannual variability and decadal stability of benthic organisms on an Indonesian coral reef. Journal of the Marine Biological Association of the United Kingdom.

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Abstract (Abstrak)

The availability of colonizable substrate is an important driver of the temporal dynamics of sessile invertebrates on coral reefs. Increased dominance of algae and, in some cases, sponges has been documented on many coral reefs around the world, but how these organisms benefit from non-colonized substrate on the reef is unclear. In this study, we described the temporal dynamics of benthic organisms on an Indonesian coral reef across two time periods between 2006 and 2017 (2006–2008 and 2014–2017), and investigated the effects of colonizable sub- strate on benthic cover of coral reef organisms at subsequent sampling events. In contrast with other Indonesian reefs where corals have been declining, corals were dominant and stable over time at this location (mean ± SE percentage cover 42.7 ± 1.9%). Percentage cover of turf algae and sponges showed larger interannual variability than corals and crustose coralline algae (CCA) (P < 0.001), indicating that these groups are more dynamic over short temporal scales. Bare substrate was a good predictor of turf cover in the following year (mean effect 0.2, 95% CI: 0–0.4). Algal cover combined with bare space was a good predictor of CCA cover the fol- lowing year generally, and of sponge cover the following year but only at one of the three sites. These results indicate that turf algae on some Indonesian reefs can rapidly occupy free space when this becomes available, and that other benthic groups are probably not limited by the availability of bare substrate, but may overgrow already fouled substrates.

Item Type: Article
Subjects: V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Depositing User: - Andi Anna
Date Deposited: 01 Sep 2021 01:26
Last Modified: 01 Sep 2021 01:30

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